Spirometer.



" No. 666,676. Patantad Jan.'29, [90L .l. HOGELAND.

SPIROMETER.

(Application filed bi 27, 1900.

No Model.

n1: nonms'pz'rsns 5a.. Pumo-uma. WASHINGTON. 0.1:.

UNITE ISRAEL IIOGELAND, OF CHICAGO, ILLINOIS, ASSIGNOR TO EMILIE C.HALL, OF SOUTH HAVEN, MICHIGAN.

SPIROMETER.

SPECIFICATION forming part of Letters Patent No. 666,676, dated January29, 1901.

Application filed August 27, 1900- Serial No. 23,160. (No model.)

To all whom it may concern.-

Be it known that I, ISRAEL HOGELAND, a citizen of the United States,residing at Cl1icage, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Spirometers, of whichthe following is a specification.

The object of this invention is the production of aspirometer for voiceculture and lung development embodying the improvements hereinafter setforth.

In the accompanying drawings, Figure 1 is a front elevation of myspirometer. Fig. 2 is a rear view, a portion of the gear-casing beingremoved to show the gearing therein. Fig. 3 is a longitudinal centralsection on dotted line 3 3 of Fig. 1.

Like letters of reference indicate corresponding parts throughout theseveral views.

In the production of this spirometer I provide the frame A, having thetubular portion .A at the forward end of the frame and theupwardly-extending car A at its rear end. Two arms A extend upwardlyfrom the frame A, the purpose of which arms will be mentioned laterherein.

The tubular portion A of the frame A is provided with the mouthpiece B,communicating with the tubular portion A by means of the openings B. Abearing-screw B is threaded centrally through said mouthpiece, and asimilar bearing-screw C extends through the ear A of the frame A. Thetwo bearingscrews B and C are in axial alinement, supporting betweentheir countersunk inner ends the shaft D, the latter having pointed endsto lie within the countersunk cups of the screws B and C and being freeto rotate between said screws. A fan D is fixed on the shaft D, theblades of which fan are set at a slight angle to the plane of itsrotation in order that it may be rotated by a current of air passingthrough the tubular portion A of-the frame A. The opposite end of theshaft D is provided with a pinion D fixed on said shaft. Theupwardlyextending arms A of the frame A support a casing E, intended toinclose the reducinggear of the mechanism. The forward side of thiscasing is arranged in dial form, as shown at E, and is provided with anindex-hand E dial E.

fixed on its central bearing-shaft E Within the casing E thisbearing-shaft E carries the gear E fixed thereon. This gear meshes withthe pinion E fixed relative to the gear-wheel E and the last-mentionedgear-wheel meshes with the pinion E of the wheel E The Wheel E mesheswith the pinion Won the gear-wheel E and the latter with the pinion Dbefore mentioned. It will thus be seen that the speed of the shaft D isgeared down very considerably.

In operation the mouthpiece B of this instrument is applied to the lipsof the user, who after taking a deep inspiration forcibly expels the airfrom his lungs through the perforations B in the mouthpiece B. Thecurrents of air coming from said openings impinge upon the vanes of thefan D, turning the latter rapidly and rotating the shaft D, upon whichit is mounted. The rotation of the shaft, with its gear D fixed thereon,imparts rotatory motion to the train of gears E E E E E", E and Egearing down the speed of the shaft D. The movement of the gear E movesthe index-hand E upon the The extent of the travel of this handindicates the amount of air expelled from the lungs of the user. 7

The instrument may be used for testing the amount of inhalation as wellas that of exhalation. The air drawn into the mouth of the user throughthe tubular portion A of the frame A rotates the fan D in a directioncontrary to that caused by exhalation.

By means of this device the capacity of the lungs is tested and by itsuse they are strengthened.

I claim as my invention- 1. In a spirometer, in combination, alongitudinal frame, having a tubular portion at one of its ends, a shaftrotatably mounted axially of said longitudinal frame, a fan fixed onsaid shaft and situated within said tubular portion, an indicator-dialmounted on said longitudinal frame near the end thereof opposite to saidtubular portion and projecting 10 on the frame to one side and near theend thereof opposite to that having the tubular portion, a dial for thegear-casing so situated as to be visible to the person using thespirometer, an indicator-hand for said dial, and a train of gearing fortransmitting rotatory motion from said pinion to-said hand.

ISRAEL HOGELAND.

Witnesses;

L. L. MILLER, GEO. L. OHINDAHL.

